A circle of small-town schoolgirls organize an attic club that grows into a playful society of secret rituals, parties, and sleuthing. Their experiments with witch and wizard themes, disguises, and club traditions lead them to investigate stealthy prowlers and puzzling incidents, to stage social gatherings and camp outings, and to encounter a lonely newcomer. Through cooperation, resourcefulness, and compassion they unravel the mysteries behind pranks and secrets, restoring order and deepening friendships by the story’s end.